Asterisk is a free to use, opensource and powerful communication system that is why it is used IP PBX systems, VoIP gateways, conference servers used in SMBs, enterprises, call centers, carriers and government institutions around the globe. Installing Asterisk Server is the first step towards implementation of an affordable, reliable and highly available PBX and VoIP systems because it is an open source platform so user may use it as per their requirement. In today’s guide we will be covering the installation and configuration of Asterisk 18 LTS on CentOS 8 because Asterisk 18 recently released for production use and is available for download. If you’re using earlier releases of Asterisk then it is the right time to plan for upgrade.
Lets Start the Installation of Asterisk and its pre-requisites use following steps:
Step 1: Updating system
Update your system before installing Asterisk.
sudo yum -y update
After updating set SELinux in permissive mode by running following commands:
sudo sed -i 's/\(^SELINUX=\).*/\SELINUX=permissive/' /etc/selinux/config
if you open selinux using “sudo nano /etc/selinux/config” will look like this because we have set selinux in permissive mode:
Step 2: Add EPEL Repository
Add EPEL repository to your CentOS 8 by using following commands:
sudo yum -y install epel-release sudo yum config-manager --set-enabled powertools
Step 3: Install Development Tools
Now install Development tools and required packages because they are pre-requisite for Asterisk.
sudo yum group -y install "Development Tools"
sudo yum -y install git wget vim net-tools sqlite-devel psmisc ncurses-devel libtermcap-devel newt-devel libxml2-devel libtiff-devel gtk2-devel libtool libuuid-devel subversion kernel-devel kernel-devel-$(uname -r) crontabs cronie-anacron libedit libedit-devel
Step 4: Download and Install Jansson
We will install Jansson which is a C library because it will_be used for media data encoding and decoding.
cd /usr/src git clone https://github.com/akheron/jansson.git cd jansson autoreconf -i ./configure --prefix=/usr/ make make install
Step 5: Download and Install PJSIP
PJSIP is a powerful multimedia communication library written in C language. It used in implementation of standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE.
Build PJSIP from source by running the following commands in your terminal.
cd /usr/src git clone https://github.com/pjsip/pjproject.git cd pjproject ./configure CFLAGS="-DNDEBUG -DPJ_HAS_IPV6=1" --prefix=/usr --libdir=/usr/lib64 --enable-shared --disable-video --disable-sound --disable-opencore-amr make dep make sudo make install sudo ldconfig
Step 6: Download and Install Asterisk
cd /usr/src wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-18-current.tar.gz tar xvfz asterisk-18-current.tar.gz cd asterisk-18.6.0
Configure the asterisk that has been downloaded by using following command:
After successful configuration of asterisk output will show like this:
Step 7: Set Asterisk menu options
Setup asterisk menu options using following command:
Use Arrow keys to navigate through the menu and Enter key to select the menu option.
1: Under Add-ons select
format_mp3 as shown below
2: On Core Sound Packages, select the formats of Audio packets like shown below:
3: For Music On Hold, select the following minimal modules
6: On Extra Sound Packages select as shown below:
app_macro under Applications section.
Feel free to modify any other settings according to your needs then save and exit when done.
Step 8: Build and Install Asterisk
Download mp3 decoder library into source tree because asterisk may use mp3.
Build and install asterisk using following commands:
make sudo make install make samples make config sudo ldconfig
Step 9: Start and Use Asterisk
sudo systemctl start asterisk
Enable Asterisk Service so that it may get started automatically whenever system is rebooted.
sudo systemctl enable asterisk
Confirm service status using the following command:
Test with asterisk command to confirm Asterisk CLI is working:
Thank you! Now you can do your configuration to run asterisk as per your requirement.